No the info I need is the WA_Store_Cart_USPS_FullResponse, it will be a long string of characters.
Try turning of debug mode, then add the following code to the failure page:
<?php
@session_start();
echo "Full Request: ".(isset($_SESSION["WA_Store_Cart_UPS_FullRequest"])?htmlentities($_SESSION["WA_Store_Cart_UPS_FullRequest"]):"n/a")."<br />";
echo "Full Response: ".(isset($_SESSION["WA_Store_Cart_UPS_FullResponse"])?htmlentities($_SESSION["WA_Store_Cart_UPS_FullResponse"]):"n/a")."<br /></p>";
?>